阅读说明：本技术 凸环双金属结构柱塞体及其制造方法、柱塞泵、柱塞马达 (Convex ring bimetal structure plunger body and manufacturing method thereof, plunger pump and plunger motor ) 是由 高翔 穆文堪 谯维智 陆红林 耿聆栋 刘晓超 焦宗夏 于 2021-09-01 设计创作，主要内容包括：本公开提供了一种凸环双金属结构柱塞体及其制造方法、和均具有该凸环双金属结构柱塞体的柱塞泵与柱塞马达,该凸环双金属结构柱塞体包括：高强度合金钢制的本体及耐磨材料制的衬套；所述本体包括同轴设置且依次连接的圆柱段、过渡段和球头；所述衬套套在所述圆柱段外,并与所述圆柱段制成一体。所述衬套远离所述过渡段的端面与所述圆柱段远离所述过渡段的端面齐平。(The utility model provides a bulge loop bimetal structure plunger body and manufacturing method thereof and plunger pump and plunger motor that all have this bulge loop bimetal structure plunger body, this bulge loop bimetal structure plunger body includes: a high-strength alloy steel body and a lining made of wear-resistant material; the body comprises a cylindrical section, a transition section and a ball head which are coaxially arranged and sequentially connected; the bush is sleeved outside the cylindrical section and is integrated with the cylindrical section. The end face of the bushing, which is far away from the transition section, is flush with the end face of the cylindrical section, which is far away from the transition section.)

1. The utility model provides a bulge loop bimetal structure plunger body which characterized in that includes: a body (10) made of high-strength alloy steel and a lining (20) made of wear-resistant material;

the body (10) comprises a cylindrical section (11), a transition section (12) and a ball head (13) which are coaxially arranged and sequentially connected;

the bush (20) is sleeved outside the cylindrical section (11) and is integrated with the cylindrical section (11).

2. A male ring bimetal structural plunger body according to claim 1, characterised in that the end face of the bush (20) remote from the transition section (12) is flush with the end face of the cylindrical section (11) remote from the transition section (12).

3. A male ring bimetal structural plunger body according to claim 1, characterised in that the length of said bush (20) is less than the length of said cylindrical section (11) and the end faces of the two ends of said bush (20) are located between the end faces of the two ends of said cylindrical section (11).

4. A torus bimetal structural plunger body according to any one of claims 1 to 3, wherein the cross-sectional area of said transition section (12) is gradually reduced from said cylindrical section (11) to said ball head (13).

5. The plunger body with the convex ring and the bimetal structure according to claim 4, wherein a step hole (14) is formed in the middle of the body (10) in a penetrating manner;

the stepped hole (14) is coaxial with the cylindrical section (11);

the large hole of the stepped hole (14) is positioned in the cylindrical section (11);

the small hole of the stepped hole (14) extends from the cylindrical section (11) to the ball head (13) and penetrates through the ball head (13).

6. A method of manufacturing a male ring bimetallic structured plug body according to any one of claims 1 to 5, characterized by the steps of:

A. processing the outer circular surface of the cylindrical section (11);

B. machining the inner circular surface of the bushing (20);

C. sleeving the bush (20) outside the cylindrical section (11), and fixing the bush (20) and the cylindrical section (11) into an integral structure;

D. and machining the outer circular surface of the bushing (20) to a designed size.

7. The method for manufacturing a plunger body with a convex ring and a bimetal structure according to claim 6, characterized in that, in the step C, the liner (20) and the cylindrical section (11) are fixed into a whole structure by adopting a diffusion welding process or a fusion casting process.

8. A plunger pump, comprising: a first cylinder, at least one first plunger hole provided on the first cylinder, and the bulge loop bimetal structure plunger body of any one of claims 1 to 5;

the number of the convex ring bimetal structure plunger bodies is equal to that of the first plunger holes;

the bush (20) and the cylindrical section (11) in the convex ring bimetal structure plunger body are of an integral structure, and the bush (20) is arranged in the first plunger hole in a sliding mode.

9. A plunger motor, comprising: a second cylinder, at least one second plunger hole provided on the second cylinder, and the bulge loop bimetal structure plunger body of any one of claims 1 to 5;

the number of the convex ring bimetal structure plunger bodies is equal to that of the second plunger holes;

the bushing (20) and the cylindrical section (11) in the convex ring bimetal structure plunger body are of an integral structure, and the bushing (20) is arranged in the second plunger hole in a sliding mode.

Technical Field

The disclosure relates to the technical field of plunger pumps, in particular to a convex ring bimetal plunger body, a manufacturing method of the convex ring bimetal plunger body, a plunger pump and a plunger motor.

Background

The plunger-cylinder part is the core part for realizing the functions of the plunger hydraulic pump and the hydraulic plunger motor, and in the working process of the plunger hydraulic pump and the plunger hydraulic motor, the plunger body bears oil pressure, centrifugal force, inertia force, return force, friction force, vertical counter force of a swash plate and the like, and is one of the parts with the most complex stress and the worst working condition of the motor. The working life and reliability of the plunger hydraulic pump/plunger hydraulic motor are directly influenced if the plunger-cylinder body component can normally work. In the prior art, the name is a Chinese utility model for a cylinder body of a plunger pump, as the publication number is CN 207004796U; for another example, the publication number is CN204371574U, which is named as a chinese utility model telling the axial plunger pump; the wear-resistant lining is integrated with the cylinder body, and the wear-resistant lining is attached to the plunger hole of the cylinder body in any mode, so that the machining difficulty is high, and the manufacturing cost is high; and a plurality of plunger holes of the cylinder body are formed, once one of the plunger holes has a processing defect, the whole cylinder body is scrapped, and higher economic cost is caused.

Disclosure of Invention

In order to solve at least one of the above technical problems, the present disclosure provides a plunger body of a convex ring bimetal structure, a manufacturing method thereof, a plunger pump, and a plunger motor.

According to an aspect of the present disclosure, a bulge loop bimetal structure plunger body comprises: a high-strength alloy steel body and a lining made of wear-resistant material;

the body comprises a cylindrical section, a transition section and a ball head which are coaxially arranged and sequentially connected;

the bush is sleeved outside the cylindrical section and is integrated with the cylindrical section.

According to at least one embodiment of the present disclosure, an end face of the bushing remote from the transition section is flush with an end face of the cylindrical section remote from the transition section.

According to at least one embodiment of the present disclosure, the length of the bushing is smaller than the length of the cylindrical section, and end surfaces of both ends of the bushing are located between the end surfaces of both ends of the cylindrical section.

According to at least one embodiment of the present disclosure, a cross-sectional area of the transition section is gradually reduced from the cylindrical section toward the ball head.

According to at least one embodiment of the present disclosure, a through step hole is formed in the middle of the body;

the stepped hole is coaxial with the cylindrical section;

the large hole of the stepped hole is positioned in the cylindrical section;

the small hole of the stepped hole extends from the cylindrical section to the ball head and penetrates through the ball head.

A method of manufacturing a male ring bimetallic structured plug body according to any one of the preceding claims, comprising the steps of:

A. processing the outer circular surface of the cylindrical section;

B. processing the inner circular surface of the bushing;

C. sleeving the bushing outside the cylindrical section, and fixing the bushing and the cylindrical section into an integral structure;

D. and machining the outer circular surface of the bushing to the designed size.

In accordance with at least one embodiment of the present disclosure, in step C, the liner and the cylindrical section are fixed into an integral structure using a diffusion welding process or a fusion casting process.

A plunger pump comprising: the plunger comprises a first cylinder body, at least one first plunger hole arranged on the first cylinder body and any one of the convex ring and bimetal structure plunger bodies;

the number of the convex ring bimetal structure plunger bodies is equal to that of the first plunger holes;

the bush in the convex ring bimetal structure plunger body and the cylindrical section are of an integral structure, and the bush is arranged in the first plunger hole in a sliding mode.

A plunger motor comprising: the plunger piston comprises a second cylinder body, at least one second plunger hole arranged on the second cylinder body and any one of the convex ring and bimetal structure plunger piston bodies;

the number of the convex ring bimetal structure plunger bodies is equal to that of the second plunger holes;

the bushing and the cylindrical section in the convex ring bimetal structure plunger body are of an integral structure, and the bushing is arranged in the second plunger hole in a sliding mode.

The beneficial effects of this disclosure are:

(1) the direct friction between the cylinder body and the rigid material of the body is avoided through the bush, and the friction working condition of the plunger-cylinder body part during working is improved;

(2) compared with the existing double-metal cylinder body structure in which copper alloy is attached to the wall of the plunger hole cavity, the single-plunger double-metal structure is simple and easy to process, although the double metals are connected into a whole by casting or diffusion welding;

(3) the single plunger has low manufacturing cost, and even if the defects exist in the process of processing the bimetal, the scrapped body is only a body with simple structure and low manufacturing cost;

(4) the bush of this disclosure directly attaches to on the cylinder section, and processing is convenient nimble, and the operation is simple and easy, compares the porous chamber wall in the current bimetal cylinder body structure and attaches to the copper alloy, has improved production efficiency greatly.

Drawings

The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the disclosure and together with the description serve to explain the principles of the disclosure.

Fig. 1 is a schematic view of a male ring bimetallic structure plunger body according to an embodiment of the present disclosure.

Reference numerals: 10-a body; 11-a cylindrical section; 12-a transition section; 13-a ball head; 14-a stepped bore; 20-lining.

Detailed Description

The present disclosure will be described in further detail with reference to the drawings and embodiments. It is to be understood that the specific embodiments described herein are for purposes of illustration only and are not to be construed as limitations of the present disclosure. It should be further noted that, for the convenience of description, only the portions relevant to the present disclosure are shown in the drawings.

It should be noted that the embodiments and features of the embodiments in the present disclosure may be combined with each other without conflict. The present disclosure will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

According to a first embodiment of the present disclosure, there is provided a male ring bimetal structure plunger body comprising: a body 10 made of high-strength alloy steel and a lining 20 made of wear-resistant material;

the body 10 comprises a cylindrical section 11, a transition section 12 and a ball head 13 which are coaxially arranged and sequentially connected;

the bush 20 is sleeved outside the cylindrical section 11 and is made into a whole with the cylindrical section 11.

The cylindrical section 11, the transition section 12 and the ball head 13 may be integrally formed.

The bushing 20 may be a clearance fit or transition fit with the cylindrical section 11 to facilitate installation of the bushing 20.

In one embodiment, the end face of the bushing 20 distal from the transition section 12 is flush with the end face of the cylindrical section 11 distal from the transition section 12; in another embodiment, the length of the bushing 20 is less than the length of the cylindrical section 11, and the end surfaces of both ends of the bushing 20 are located between the end surfaces of both ends of the cylindrical section 11; to ensure that the bush 20 is effectively supported by the cylindrical section 11 over the entire length of the bush 20, avoiding deformation of the bush 20.

In one embodiment, the cross-sectional area of the transition section 12 gradually decreases from the cylindrical section 11 to the ball 13, thereby avoiding a sharp change in the cross-section of the body 10 and reducing stress concentration.

A step hole 14 is formed in the middle of the body 10;

the stepped hole 14 is coaxial with the cylindrical section 11;

the large hole of the stepped hole 14 is positioned in the cylindrical section 11;

the small hole of the stepped hole 14 extends from the cylindrical section 11 to the ball head 13 and penetrates through the ball head 13.

The stepped hole 14 has a weight-reducing effect on the one hand; on the other hand, the lubricating oil can enter the outer spherical surface of the ball head 13 through the stepped hole 14, thereby lubricating the ball head 13.

The present disclosure provides a method of manufacturing a torus bimetal structure plunger body according to any one of the preceding claims, comprising the steps of:

A. processing the outer circular surface of the cylindrical section 11;

B. machining the inner circular surface of the bush 20;

C. sleeving the bush 20 outside the cylindrical section 11, and fixing the bush 20 and the cylindrical section 11 into an integral structure;

D. the outer circumferential surface of the liner 20 is machined to a design size.

The outer circular surface of the cylindrical section 11 and the inner circular surface of the bush 20 can be machined by the existing turning process, milling process and grinding process; the outer circular surface of the cylindrical section 11 and the inner circular surface of the bushing 20 are processed firstly, so that the precision of the joint surface of the bushing 20 and the cylindrical section 11 is improved, and the implementation of the subsequent process is facilitated.

The bush 20 may be integrated with the cylindrical section 11 by a conventional technique such as welding. In a preferred embodiment, in step C, the liner 20 and the cylindrical section 11 are fixed as a unitary structure using a diffusion welding process or a fusion casting process.

After the bush 20 and the cylindrical section 11 are combined into a whole, the outer circular surface of the bush 20 is processed, and the influence of a combination process on the size precision is avoided.

The present disclosure provides a plunger pump comprising: the cylinder comprises a first cylinder body, at least one second cylinder hole arranged on the second cylinder body, a high-strength alloy steel body 10 and a lining 20 made of wear-resistant materials;

the number of the bodies 10 and the bushes 20 is equal to the number of the first plunger holes;

the body 10 comprises a cylindrical section 11, a transition section 12 and a ball head 13 which are coaxially arranged and sequentially connected;

the bush 20 is sleeved outside the cylindrical section 11;

a bushing 20 is integrally formed with the cylindrical section 11 and the bushing 20 is slidably disposed in the first plunger bore.

The present disclosure provides a plunger motor, including: the cylinder comprises a second cylinder body, at least one second cylinder hole arranged on the second cylinder body, a high-strength alloy steel body 10 and a lining 20 made of wear-resistant materials;

the number of the body 10 and the bush 20 is equal to that of the second plunger holes;

the body 10 comprises a cylindrical section 11, a transition section 12 and a ball head 13 which are coaxially arranged and sequentially connected;

the bush 20 is sleeved outside the cylindrical section 11;

the bushing 20 is made in one piece with the cylindrical section 11 and the bushing 20 is slidingly arranged in the second socket hole.

In the description herein, reference to the description of the terms "one embodiment/mode," "some embodiments/modes," "example," "specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment/mode or example is included in at least one embodiment/mode or example of the application. In this specification, the schematic representations of the terms used above are not necessarily intended to be the same embodiment/mode or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments/modes or examples. Furthermore, the various embodiments/aspects or examples and features of the various embodiments/aspects or examples described in this specification can be combined and combined by one skilled in the art without conflicting therewith.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

It will be understood by those skilled in the art that the foregoing embodiments are merely for clarity of illustration of the disclosure and are not intended to limit the scope of the disclosure. Other variations or modifications may occur to those skilled in the art, based on the foregoing disclosure, and are still within the scope of the present disclosure.